66 lines
2.8 KiB
C++
66 lines
2.8 KiB
C++
/*
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* Copyright (C) 2020 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "ImageBuffer.h"
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#include <wtf/OptionSet.h>
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namespace WebCore {
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enum class SerializationState : uint8_t {
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OriginClean = 1 << 0,
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PremultiplyAlpha = 1 << 1,
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ForciblyPremultiplyAlpha = 1 << 2
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};
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class ImageBitmapBacking {
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public:
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ImageBitmapBacking(RefPtr<ImageBuffer>&&, OptionSet<SerializationState> = SerializationState::OriginClean);
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ImageBuffer* buffer() const;
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RefPtr<ImageBuffer> takeImageBuffer();
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unsigned width() const;
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unsigned height() const;
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bool originClean() const { return m_serializationState.contains(SerializationState::OriginClean); }
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bool premultiplyAlpha() const { return m_serializationState.contains(SerializationState::PremultiplyAlpha); }
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// When WebGL consumes an Image coming from an ImageBitmap's ImageBuffer, it typically honors
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// the alpha mode of that native image - CGImageAlphaInfo in the Core Graphics backend. For
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// ImageBitmaps created from ImageBitmaps, this information is not accurate, and callers must be
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// told to ignore the alpha mode, and forcibly premultiply the alpha channel.
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bool forciblyPremultiplyAlpha() const { return m_serializationState.contains(SerializationState::ForciblyPremultiplyAlpha); }
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OptionSet<SerializationState> serializationState() const { return m_serializationState; }
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private:
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RefPtr<ImageBuffer> m_bitmapData;
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OptionSet<SerializationState> m_serializationState;
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};
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} // namespace WebCore
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